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Write structure formulae and names of four possible aldol condensation products form propanal and butanal. In each case, indicate which aldehyde acts as nucleophile and which as electrophile.

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The rate of SN^2 reaction depends on the effectiveness of the nucleophile in ejecting the leaving group. Nucleophilicity is the affinity for C atom, while basicity is the affinity for proton. In both cases, a new bond is formed. If a new bond is formed between the anion and proton, the specied acts as a base. If a new bond is formed between the anion and C atom, the species acts as nucleophile. Which of the following statements is wrong ? Nucleophile order of the following in weakly polar aprotic solvents, e.g., acetone is :

The rate of SN^2 reaction depends on the effectiveness of the nucleophile in ejecting the leaving group. Nucleophilicity is the affinity for C atom, while basicity is the affinity for proton. In both cases, a new bond is formed. If a new bond is formed between the anion and proton, the specied acts as a base. If a new bond is formed between the anion and C atom, the species acts as nucleophile. Which of the following is wrong ?

NCERT-ALDEHYDES, KETONES AND CARBOXYLIC ACIDS-Exercise
  1. What is meant by the following terms ? Give an example of the reaction...

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  2. Name the following compounds according to the IUPAC system of nomencla...

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  3. Draw the structures of following compound: i. 3-Methylbutanal ii. ...

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  4. Write the IUPAC names of following ketones and aldehydes. Wherever pos...

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  5. Draw the structure of following derivatives: i. 2,4-Dinitrophenylhyd...

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  6. Predict the products formed when cyclohexane carbaldehyde reacts with ...

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  7. Which of the following compounds would undergo aldol condensation or t...

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  8. How will you convert ethanal into the following compounds ? i. Butan...

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  9. Write structure formulae and names of four possible aldol condensation...

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  10. An organic compound with the molecular folmula C(9)H(10)O form 2,4-DNP...

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  11. An organic compound (A) (molecular formula C(8)H(16)O(2)) was hydrolys...

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  12. Arrange the following compounds in the increasing order of their prope...

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  13. Give simple chemical test to distinguish between the following pairs o...

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  14. How will you prepare the following compounds from benzene ? You may us...

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  15. How will you bring about the following conversions in not more than tw...

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  16. Describe the following i. Acetylation ii. Cannizzaro reaction i...

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  17. Complete each synthesis by giving missing starting material, reagent o...

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  18. Giving plausible explanation for each of the following: i. Cyclohexa...

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  19. An organic compound contains 69.77% carbon, 11.63% hydrogen, and rest ...

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  20. Although phenoxide ion has more number of resonating structures than c...

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